JPH0244972B2 - YUKAOYOBIHEKIMENKOOTEINGUNOSEKOHOHO - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for applying floor and wall coatings, and in particular to a method for applying durable floor and wall coatings in a short period of time on substrates having porous surfaces such as concrete. Floors and walls made of concrete, asphalt, metal, etc. are painted with various solvent-based or emulsion-based paints for dust prevention, corrosion prevention, aesthetics, and other purposes, but these paints are difficult to apply thickly and have limited durability. has its limits. Therefore, for applications with particularly strong demands such as durability and chemical resistance, synthetic resin-coated flooring has traditionally been applied by coating liquid resins mainly composed of epoxy resins, unsaturated polyester resins, polyurethane resins, etc., and hardening after installation. material is used. Epoxy resins are used in a wide variety of fields due to their alkali resistance and high strength, but they generally lack flexibility, tend to crack easily, and have poor weather resistance. Polyester resin is used for factory floors due to its acid resistance, but it also lacks flexibility, shrinks a lot when cured, and has poor weather resistance. Polyurethane resin has elasticity and flexibility and is widely used as a light-load floor, but it has poor chemical resistance and weather resistance. In addition, these materials have poor construction productivity due to their long curing time, and their curability becomes extremely poor especially when construction is performed in a low-temperature atmosphere (particularly below 5° C.) during winter. When applying these synthetic resin flooring materials to a base such as concrete, asphalt, or metal, a primer is applied in advance and the synthetic resin is applied on top of the primer in order to improve adhesion to the base and suppress the effects of the base. A construction method in which the flooring material is coated over and over again is generally used. Primers include a solvent type in which epoxy resin, unsaturated polyester resin, polyurethane resin, or acrylic resin is dissolved in a solvent, an emulsion type in which it is dispersed in water, and a hardening type in which these liquid resins are hardened after application. They are used depending on the type of base material and the type of synthetic resin coated flooring material used for topcoating. However, since these primers take a long time to dry or harden, construction productivity is poor if the primer must be dried or hardened before being overcoated. Particularly in low-temperature environments during winter, solvent type and emulsion type
Drying of water becomes slow, and even for hardening types, hardening time becomes longer, resulting in extremely poor construction productivity. A major drawback of the construction method using a combination of the above-mentioned primer and synthetic resin coated flooring material is that it takes a long time to complete the construction. Especially in low-temperature atmospheres such as winter, the construction time becomes extremely long, and in some cases, construction becomes impossible. Completing construction within a predetermined short period of time and making it usable is not only an economical benefit of simply improving construction productivity, but there are also strong demands. For example, repairing hallways in residential condominiums, adding anti-slip or colored paving to roads with heavy traffic, painting factory floors that can only be shut down at night, and finding time for construction work only for a few hours during the day. When it comes to repainting baths in hotels that are currently open, there is only a limited amount of time to complete the work and restore it to a usable condition, making it impossible to do so using conventional construction methods. As described above, the present invention provides a method for constructing floor and wall coatings that can complete the construction and restore the product to a usable condition within a short time that was impossible with conventional construction methods. Moreover, according to the construction method of the present invention, a coating film with excellent durability, chemical resistance, and weather resistance can be obtained. Furthermore, the construction method of the present invention exhibits excellent characteristics when coating floors or walls with concrete as a base. In the present invention, a primer composition containing the following unsaturated β-hydroxy ester is applied and cured to cover a base, and then an acrylic curable liquid resin composition is applied on the cured coating film of the primer composition. This is a method of applying floor and wall coatings, which is characterized by applying and curing a topcoating composition as a binder. <Primer composition> (A) Unsaturated β-hydroxy ester 30-60% by weight (B) Methyl methacrylate or a polymerizable unsaturated monomer containing 80% by weight or more of methyl methacrylate 70-40% by weight (C ) Paraffin and/or wax having a melting point of 40°C or higher, based on 100 parts by weight of the total amount of (A) and (B),
0.1 to 5 parts by weight (D) 0.1 to 5 parts by weight per 100 parts by weight of tertiary amine, (A) and (B) (E) Organic peroxide, (A) and (B) 0.2 to 5 parts by weight based on the total amount of 100 parts by weight The acrylic curable liquid resin composition used as a binder for the top coating formulation uses at least one type of acrylic ester and/or methacrylic ester as a liquid component. It is a liquid resin composition whose basic mechanism is to cure this by radical polymerization using a redox catalyst using a combination of a curing agent and an accelerator, such as the following (A) to (F). A composition comprising: (A) At least one acrylic ester and/or methacrylic ester (B) A polymer or copolymer soluble in (A) (C) Having at least two polymerizable double bonds in one molecule Compound (D) Paraffin and/or wax (E) Tertiary amine (F) Organic peroxide As the polymer or copolymer of component (B), vinyl acetate polymer or vinyl chloride-vinyl acetate copolymer is used. However, by preferably using a polymer or copolymer of at least one acrylic ester and/or methacrylic ester, a composition with better weather resistance of the coating film can be obtained. . Furthermore, by replacing a part of the polymer or copolymer of component (B) with a plasticizer soluble in component (A), a composition with a good balance between strength and flexibility of the coating film can be obtained. can. Thus, the compositions consisting of (A) to (G) below are preferred examples as binder compositions for the topcoat formulation used in the present invention. (A) At least one acrylic ester and/or methacrylic ester 51 to 85% by weight (B) A polymer or copolymer of at least one acrylic ester and/or methacrylic ester soluble in (A) 10 ~24% by weight (C) Plasticizer soluble in (A) 5~25% by weight (D) Compounds having at least two polymerizable double bonds in one molecule, (A), (B), ( 0.1 to 10 parts by weight per 100 parts by weight of the total amount of C) (E) Paraffin with a melting point of 40°C or higher and/or
Or 0.1 to 5 parts by weight per 100 parts by weight of wax, (A), (B), and (C) (F) Total amount of tertiary amine, (A), (B), and (C) 100 parts by weight 0.1 to 6 parts by weight per part by weight (G) 0.2 to 5 parts by weight per 100 parts by weight of the total amount of organic peroxide, (A), (B), and (C) Component (A) is a homopolymer Monomers with a glass transition temperature of 80°C or higher, such as methyl methacrylate and t-butyl methacrylate, as well as monomers with a glass transition temperature of 0°C or lower, such as butyl acrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, and lauryl methacrylate. A mixture is a preferred combination because it provides the coating with appropriate strength and flexibility. Examples of monomers for obtaining the polymer or copolymer of component (B) include methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, i-butyl methacrylate, t-butyl methacrylate, and dimethacrylate. - Ethylhexyl, lauryl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, i-butyl acrylate, t-butyl acrylate, and 2-ethylhexyl acrylate. Examples of the plasticizer of component (C) include phthalic acid esters such as dibutyl phthalate and di-2-ethylhexyl phthalate, di-2-ethylhexyl adipate, di-2-ethylhexyl sebacate, and di-2-ethylhexyl adipate.
Examples include at least one kind or a mixture of two or more kinds selected from -ethylhexyl azelate, polypropylene glycol, chlorinated paraffin, polyester polymer plasticizers, epoxy polymer plasticizers, and the like. Component (D) includes ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate,
polyfunctional esters of acrylic acid or methacrylic acid such as 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, pentaerythritol triacrylate, divinylbenzene, diallyl phthalate, triallyl cyanurate,
Examples include allyl acrylate and allyl methacrylate, which may be used alone or in combination of two or more. Component (E) includes paraffin wax, polyethylene wax, higher fatty acids such as stearic acid and 1,2-hydroxystearic acid, and paraffin wax is preferably used. Component (F) is a promoter of the redox catalyst system. As a tertiary amine, at least one
Preferably, aromatic residues of
In particular, N,N'-dimethylaniline, N,N'-dimethyl-P-toluidine, N,N'-di(hydroxyethyl)-P-toluidine, N,N'-di(2-
One or a combination of two or more of (hydroxypropyl)-P-toluidine is preferred. Component (G) is a redox catalyst-based curing agent. A preferred example of the organic peroxide is benzoyl peroxide. Benzoyl peroxide is concentrated in an inert liquid or solid form to avoid handling hazards.
It is preferable to use a paste or powder diluted to about 50%. The top coating composition used in the present invention is obtained by mixing a coloring agent such as a pigment, an aggregate such as silica sand, and other additives as necessary with the above-mentioned binder composition. Since the curing agent and accelerator in the binder composition constitute a redox catalyst system,
The polymerizable monomers in the composition initiate radical polymerization and the topcoat formulation is cured within a predetermined period of time. Therefore, the curing agent in the binder composition is usually added to the composition immediately before coating. Since the top coating composition used in the present invention is cured by redox polymerization as described above, it has excellent curability at room temperature and low temperature. From the viewpoint of construction productivity, it is preferable that the curing time be as short as possible, but in the case of floor and wall coatings, after application,
There must be enough time for the paint surface to become smooth before the mixture loses its fluidity and hardens (the time during which the mixture maintains sufficient fluidity necessary for the work is called pot life). Must be. If the pot life and curing time are too short, the coating operation becomes difficult and a good coating film cannot be obtained.
The amounts of curing agent and accelerator are adjusted depending on the temperature of the formulation or the air temperature at the time of application so that the pot life required for the job is obtained and the curing time is sufficiently short. Ru. Generally, the preferred pot life is 5 to 30 minutes, and the preferred cure time is 10 minutes.
~120 minutes. The topcoat formulations used in this invention can be cured at -20°C to 40°C with the preferred cure times described above. The primer composition used in the present invention improves the above-mentioned drawbacks of conventional primers and provides an excellent primer that cures in a short time at low and room temperatures. According to the construction method of the present invention, the characteristics of both the primer that hardens in a short time and the topcoat composition that hardens in a short time are utilized, and a construction method with extremely high construction productivity is provided. The primer composition used in the present invention is as follows (A) to
A primer composition containing an unsaturated β-hydroxy ester consisting of (E). (A) Unsaturated β-hydroxy ester 30 to 60% by weight (B) Methyl methacrylate or a polymerizable unsaturated monomer containing 80% or more of methyl methacrylate 70 to 40% by weight (C) 40°C or higher paraffin with a melting point and/or
Or wax, 0.1 to 5 parts by weight per 100 parts by weight of the total amount of (A) and (B) (D) 0.1 to 5 parts by weight of tertiary amine, per 100 parts by weight of the total amount of (A) and (B) Part (E) Organic peroxide, 0.2 to 5 parts by weight based on 100 parts by weight of the total amount of (A) and (B) The unsaturated β-hydroxy ester of component (A) is an epoxy resin and (a) methacrylic acid. and/or acrylic acid
74-64 mol% and (b) at least one long-chain monocarboxylic acid.
It is produced by reaction with a mixture of 26-36 mol%. The epoxy resin is preferably one based on bisphenol A and epichlorohydrin and having a molecular weight of 800 to 3,000 and an epoxide equivalent of 400 to 2,500.
The long-chain monocarboxylic acid is at least one saturated monocarboxylic acid having 8 to 20 carbon atoms, or 80 mol% or more of at least one saturated monocarboxylic acid having 8 to 20 carbon atoms and 8 to 20 carbon atoms. at least one unsaturated monocarboxylic acid having carbon atoms of
It is preferred to use a mixture with up to 20 mol % of the species. Examples of the saturated monocarboxylic acid include caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, and stearic acid. Examples of the unsaturated monocarboxylic acids include lauroleic acid, myristoleic acid, palmitoleic acid,
Examples include oleic acid and lintinolic acid. Examples of the polymerizable unsaturated monomer of component (B) include methyl acrylate, ethyl acrylate, n-butyl acrylate, i-butyl acrylate, 2-ethylexyl acrylate, n-butyl methacrylate, and methacrylate. Examples include acrylic acid or methacrylic acid esters such as 2-ethylhexyl acid and lauryl methacrylate. Component (B) can also contain a known crosslinking agent. As a crosslinking agent, a compound containing at least two vinyl groups and/or allyl groups in one molecule, such as ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, diacrylic acid 1 , 4-butanediol, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate,
Mention may be made of polyfunctional esters of acrylic acid or methacrylic acid such as diethylene glycol diacrylate, pentaerythritol triacrylate, and pentaerythritol tetraacrylate, or triallyl compounds such as triallyl cyanurate. Component (C) includes paraffin wax, polyethylene wax, and acid-proofing fats such as stearic acid and 1,2-hydroxystearic acid, but paraffin wax is preferably used. Component (D) is a promoter of the redox catalyst system. As the tertiary amine, those having at least one aromatic residue directly bonded to the nitrogen atom are preferred, and in particular, N,N'-dimethylaniline, N,
N'-dimethyl-P-toluidine, N,N'-di(hydroxyethyl)-P-toluidine, N,
One type or a combination of two or more types of N'-di(2-hydroxypropyl)-P-toluidine is preferred. Component (E) is a redox catalyst-based curing agent. A preferred example of the organic peroxide is benzoyl peroxide. Benzoyl peroxide is concentrated in an inert liquid or solid form to avoid handling hazards.
It is preferable to use a paste or powder diluted to about 50%. When considering coating workability, the curing time of the primer composition used in the present invention is 10 to 120 minutes,
It is necessary to adjust the amount of accelerator and/or curing agent depending on the temperature of the composition and the temperature at the time of coating. The main feature of the primer composition used in the present invention that differs from the binder composition of the topcoat formulation is that it contains an unsaturated β-hydroxy ester, and because of this feature, it exhibits favorable properties as a primer. . That is, the primer composition used in the present invention is cured by a radical polymerization mechanism initiated by a redox catalyst system using a combination of a curing agent and an accelerator, similar to the binder composition of the top coating formulation, but in the present invention, Radical polymerization of the primer composition used is hardly inhibited by dirt adhering to the surface of the base, and curing is not inhibited. Further, the primer composition of the present invention does not cause curing inhibition even by air trapped in the small pores of the porous surface of concrete, mortar, etc. Therefore, the primer composition used in the present invention has extremely excellent characteristics as a primer, and is particularly excellent as a primer for substrates with porous surfaces such as concrete and mortar. According to the application method of the present invention, the primer composition cures within a short time and completely covers the base, regardless of whether the base is dirty or has a porous surface such as concrete or mortar. The binder composition is not inhibited from curing by the influence of the substrate and cures within a short period of time. Therefore, the application method of the present invention can produce a durable coating film in a short time, for example within two hours, which was previously impossible. Furthermore, the binder composition for the topcoat formulation of the present invention has excellent weather resistance and chemical resistance, so that high-performance floor and wall coatings can be applied. In the present invention, the primer composition is applied to the base using a spray, roller, brush, trowel, etc. to a suitable thickness, for example, 0.1 to 1 mm. For extremely porous surfaces such as concrete and mortar, it is preferable to apply it thickly to allow for penetration into small pores. The primer composition used in the present invention is usually coated with only a curing agent added, but a coloring agent may be added to clearly mark the area to be coated, or when coating on a vertical surface such as a wall. A thixotropic agent such as asbestos, sepiolite, aerosil can be added to impart thixotropy to the composition. Further, if necessary, aggregates and fillers such as silica sand, silica sand powder, and calcium carbonate can be mixed with the primer composition of the present invention for coating. The primer composition used in the present invention has excellent adhesion to the substrate, and in order to further stabilize the adhesion, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, A silane coupling such as silane can be added. The top coat binder composition of the present invention is applied as a mixture with aggregate and other fillers. Examples of aggregates include sand, silica sand, quartz sand, colored or fired products of these, rock powder such as quartz powder and silica sand powder, colored porcelain, pulverized ceramic bases that have been fired and hardened, zinc white, Examples include calcium carbonate, alumina, and glass beads. A combination of aggregates with different particle sizes is preferred for improving coating workability and self-leveling properties. Also,
Asbestos, sepiolite, silica powder such as Aerosil, etc. can also be added as fillers to impart thixotropy to the formulation. In addition to the above-mentioned fillers, it is preferable to use colored pigments and dyes, such as titanium oxide, barium sulfate,
Carbon black, chrome vermilion, red iron, ultramarine blue, cobalt blue, phthalocyanine blue, phthalocyanine green, etc. are used. Generally, 0 to 900 parts by weight of these aggregates/fillers are mixed with 100 parts by weight of the binder composition and used for coating. The top coating composition can be applied by spraying, troweling, brushing, roller coating, or the like. By pre-coating a mixture with no or only a portion of aggregate mixed in, and by distributing the aggregate before the binder composition has hardened, some of the aggregate protrudes from the coating surface and imparts non-slip properties. Other construction methods are also possible. In formulations in which aggregates are mixed in advance, the type and amount of aggregates are selected depending on the purpose of coating. Applications such as spraying, brushing, and roller coating produce relatively thin coatings, i.e. 0.2
Although a coating film of ~1 mm can be applied, when blending for such purposes, the amount of aggregate is preferably 30 to 100 parts by weight based on 100 parts by weight of the binder composition. When applying a thicker coating film, that is, a coating film of 1 to 30 mm, a metal trowel finish is preferred, and the amount of aggregate is preferably 100 to 900 parts by weight per 100 parts by weight of the composition of the present invention. In this case, if a smooth coating surface is desired, it is preferable that the aggregate amount be close to 100 parts by weight, and if the coating film is thick, an aggregate amount close to 900 parts by weight is preferable from an economical point of view. . If it exceeds 900 parts by weight, the curing properties of the compound will deteriorate, which is not preferable. An application method in which the topcoat formulation is applied in two or more layers is also included in the present invention. For example, if you want to apply a relatively thick coating with a smooth coating surface, from an economical point of view it is best to apply a formulation with a high aggregate content and then finish with a formulation with a low aggregate content. This is the case. All parts in the examples below refer to parts by weight, and pot life and cure time are based on the time the curing agent is added to the formulation. Example 1 Unsaturated β-hydroxy ester 55 obtained by reacting methacrylic acid and lauric acid with an epoxy resin based on bisphenol A and epichlorohydrin and having a molecular weight of 1600 and an epoxide equivalent weight of 925.
44 parts of methyl methacrylate, 0.5 part of paraffin having a melting point of 50-52°C, 1 part of N,N'-di(2-hydroxypropyl)-P-toluidine, and 3 parts of benzoyl peroxide powder at a concentration of 50%. Apply the composition to the concrete floor surface by approximately 0.5 mm using a roller.
When applied to a thickness of , it cured and formed a coating film in 26 minutes at a temperature of 20°C. On the cured coating film of the primer composition, 40 parts of methyl methacrylate, 20 parts of 2-ethylhexyl acrylate, 20 parts of a copolymer of methyl methacrylate and butyl acrylate, 2 parts of ethylene glycol dimethacrylate, and chlorinated Paraffin (50% chlorine content)
10 parts octyldecyl phthalate, melting point 54-56
0.5 part paraffin at °C, 0.5 part paraffin at melting point 64-66 °C, N,N'-di(2-hydroxypropyl)
An acrylic curable liquid resin composition consisting of 0.5 part of -P-toluidine, 2 parts of benzoyl peroxide powder with a concentration of 50%, 50 parts of silica sand powder, 50 parts of silica sand No. 8, and a coloring agent (EST-417 manufactured by Nikko Vicks). Green) 4 parts were mixed well to make a topcoat formulation, and this was applied to a thickness of about 2 mm using a metal trowel.
It was cured after 1 hour at ℃ to form a beautiful coating film with a smooth surface. In this way, the construction of both the primer and the top coat was completed within 2 hours in total. Two days later, the adhesive strength was measured using a Kenken type adhesion tester, and it broke from the concrete at 27.5 kg/cm ² , and the adhesion between the base and primer and the primer and top coat was good. The topcoat film was shown to have sufficient strength. Comparative Example 1 The top coating composition of Example 1 was applied directly to a concrete floor surface using a metal trowel to a thickness of about 2 mm, and was apparently cured after about 1 hour at a temperature of 20°C. When this coating film was peeled off two days later, it peeled off easily and was not adhered to the base. Additionally, the back side of the paint film, which was in contact with the concrete base, was not sufficiently cured, and there was an odor of acrylic monomer. Comparative Example 2 Instead of the primer composition of Example 1, an epoxy curing type primer (Tough Epon P-1 manufactured by Nippon Debcon Co., Ltd.) was applied to the concrete floor surface to a thickness of about 0.5 mm using a roller, and the temperature was 20°C. ~22℃ approx.
It was left to stand for 18 hours to cure and form a coating film. When the top coating composition of Example 1 was applied onto the epoxy primer in the same manner as in Example 1, it cured in about 1 hour at a temperature of 20°C, resulting in a beautiful coating film with a smooth surface. In this case, approximately 19 hours of construction time was required, including both the primer application and the topcoat application. Example 2 Unsaturated β-hydroxy ester obtained by reacting methacrylic acid and lauric acid with an epoxy resin based on bisphenol A and epichlorohydrin and having a molecular weight of 1350 and an epoxide equivalent weight of 850.
50 parts of methyl methacrylate, 0.5 part of paraffin with a melting point of 50-52°C, 1 part of N,N'-di(2-hydroxypropyl)-P-toluidine, 2 parts of N,N'-dimethyl-P-toluidine. When a primer composition consisting of 5 parts of benzoyl peroxide powder with a concentration of 50% was applied to a concrete floor surface to a thickness of approximately 0.4 mm using a spatula, it cured in 20 minutes at a temperature of 3°C, forming a strong coating film. did. On the cured coating film of the primer composition, 40 parts of methyl methacrylate, 25 parts of 2-ethylhexyl acrylate, methyl methacrylate and n-methacrylate were added.
20 parts of butyl copolymer, 5 parts of tetraethylene glycol dimethacrylate, 10 parts of di-2-ethylhexyl phthalate, 0.5 part of paraffin with a melting point of 44-48°C,
0.5 part of paraffin, melting point 56-58°C, 0.5 part of N,N'-di(2-hydroxypropyl)-P-toluidine
As a binder, an acrylic hardening type liquid resin consisting of 5 parts of benzoyl peroxide powder with a concentration of 50% is used as a binder.
30 parts of the binder, 15 parts of silica sand powder, 20 parts of silica sand No. 8,
33 parts of silica sand No. 6, coloring agent (EST-
417 Green) was applied to a thickness of approximately 3 mm using a metal trowel, and it cured in 60 minutes at a temperature of 3°C to form a smooth and beautiful coating. The adhesion strength of the floor coating was measured using a Kenken type adhesion tester two days after installation, and it was 22.5.
It broke from the concrete part at Kg/cm ² , showing that the adhesion between the primer and the base and between the primer and the top coat was good, and the primer and top coat had sufficient strength. In this way, it was possible to complete a durable floor coating, including primer and topcoat, within 2 hours at an air temperature of 3°C. Comparative Example 3 Comparative Example 2 instead of the primer composition of Example 2
The epoxy-based hardening type primer was applied to the concrete floor surface using a spatula to a thickness of about 0.4 mm, and left to cure at a temperature of 3 to 5°C for about 18 hours to form a coating film. The topcoat formulation of Example 2 was applied onto the primer coating using a metal trowel to a thickness of about 3 mm.
After about 2 hours at an air temperature of 3-5 DEG C., about 40% of the topcoat formulation was cured, but the remaining about 60% was insufficiently cured. Even after 24 hours, hardening of the uncured portions hardly progressed. In this example, if an epoxy-based primer is used at a low temperature below 5°C, even if the topcoat formulation is applied after a considerable period of time,
It turns out that application is virtually impossible since the curing of the topcoat formulation is inhibited. Example 3 The primer composition of Example 2 was applied to a concrete floor surface to a thickness of about 0.4 mm using a roller and cured at the temperatures shown in Table 1 to form a primer coating. On the cured coating film of the primer composition, 0.5 parts of N,N'-di(2-hydroxypropyl)-P-toluidine and 2 parts of N,N'-dimethyl-P-toluidine as tertiary amines, The same formulation as the top coating formulation of Example 1 was applied using a metal trowel to a thickness of approximately 3 mm, except that 5 parts of benzoyl peroxide powder with a concentration of 50% was used, and the surface was cured at the temperature shown in Table 1. A smooth and beautiful coating was formed. The temperature and curing time at this time were as shown in Table 1.

[Table] Example 4 Using a roller, the same primer composition as in Example 1 was used, except that 6 parts of benzoyl peroxide powder with a concentration of 50% and 2 parts of asbestos fiber (Sylodex 24, manufactured by Grace) were used. When applied to a thickness of approximately 0.5 mm on a vertical concrete wall, it cured in 40 minutes at a temperature of 5°C, forming a primer coating. On the cured coating film of the primer composition, 42 parts of methyl methacrylate, 18 parts of n-butyl acrylate,
20 parts of copolymer of methyl methacrylate and butyl acrylate, 20 parts of chlorinated paraffin (chlorine content 40%)
parts, 2 parts of ethylene glycol dimethacrylate,
The binder is an acrylic hardening liquid resin consisting of 1 part of N,N'-di(2-hydroxypropyl)-P-toluidine and 3.5 parts of benzoyl peroxide paste with a concentration of 50%, and 70 parts of the binder is mixed with 25 parts of silica sand powder.
Part, gray coloring agent (EST-
A top coating composition containing 5 parts of 015X-1) and 1 part of Aerosil 200 was applied to a thickness of about 0.5 mm using a roller, and cured in 45 minutes at a temperature of 5°C. In order to provide sufficient durability, the same topcoat compound is applied again to a thickness of approximately 0.5 mm on top of the cured film using a roller, creating a smooth and beautiful coating for protecting concrete walls. A membrane was obtained. Adhesion strength was measured using a Kenken type adhesion tester two days after construction, and it was found that it broke from the concrete at 27.2 kg/cm ² , and the adhesion between the primer and the concrete base, the primer and the top coat, and the top coat was good. It was also shown that the strength of the primer and top coat was sufficient. Example 5 Instead of a concrete floor surface, Konishi Co., Ltd.
Apply vinyl acetate emulsion adhesive for woodwork to a dry film thickness of 0.1 to 0.2 m/m.
Coating film performance evaluation was carried out in the same manner as in Example 1, except that a mortar plate obtained by drying and having a dirty surface was used. The primer composition cured in about 30 minutes and had good adhesion to the mortar board. In addition, the adhesive strength of the top coating resin composition after curing was 20.1 Kg/cm ² ,
It showed good adhesion. Comparative Example 4 Except that 10 parts of unsaturated β-hydroxy ester, 25 parts of n-butyl acrylate, and 20 parts of 2-hydroxyethyl acrylate were used instead of 55 parts of unsaturated β-hydroxy ester in the primer composition. When evaluation was carried out in the same manner as in Example 5, the primer composition hardly cured even after 60 minutes or more, and it was not possible to apply and cure the topcoat resin composition and evaluate the coating film performance. Comparative Example 5 Instead of using a mortar board, the damaged concrete floor surface was repaired using ethylene vinyl acetate polymer cement "Himol" manufactured by Showa Denko Co., Ltd.
On a dry floor surface, 20 parts of unsaturated β-hydroxy ester obtained in the same manner as in Example 1, 29 parts of methyl methacrylate, 30 parts of n-butyl acrylate, 20 parts of 2-hydroxyethyl acrylate, melting point 50~ A primer composition consisting of 0.5 part of paraffin at 52°C, 1 part of N,N'-di(2-hydroxypropyl)-P-toluidine and 3 parts of benzoyl peroxide powder at a concentration of 50% was applied and cured at 20°C. When I tried,
Even after 60 minutes or more, it was hardly cured, and it was not possible to apply and cure the topcoat resin composition and evaluate the coating film performance.

Claims (1)

[Scope of Claims] 1. After coating a base by applying and curing a primer composition containing the following unsaturated β-hydroxy ester, an acrylic curable liquid type is applied on the cured coating film of the primer composition. A construction method for floor and wall surface coatings, which comprises applying and curing a topcoat compound containing a resin composition as a binder. <Primer composition> (A) Unsaturated β-hydroxy ester 30-60% by weight (B) Methyl methacrylate or a polymerizable unsaturated monomer containing 80% by weight or more of methyl methacrylate 70-40% by weight (C ) Paraffin and/or wax having a melting point of 40°C or higher, based on 100 parts by weight of the total amount of (A) and (B),
0.1 to 5 parts by weight (D) 0.1 to 5 parts by weight per 100 parts by weight of tertiary amine, (A) and (B) (E) Organic peroxide, (A) and (B) 0.2 to 5 parts by weight based on the total amount of 100 parts by weight 2 The acrylic curable liquid resin composition is the following (A) -
The method for applying floor and wall coatings according to claim 1, which is a composition containing (G) as an essential component. (A) At least one acrylic ester and/or methacrylic ester 51 to 85% by weight (B) A polymer or copolymer of at least one acrylic ester and/or methacrylic ester soluble in (A) 10 ~24% by weight (C) Plasticizer soluble in (A) 5~25% by weight (D) Compounds having at least two polymerizable double bonds in one molecule, (A), (B), ( 0.1 to 10 parts by weight per 100 parts by weight of the total amount of C) (E) Paraffin and/or wax having a melting point of 40°C or higher, per 100 parts by weight of the total amount of (A), (B), and (C) 0.1 to 5 parts by weight (F) Tertiary amine, 0.1 to 6 parts by weight per 100 parts by weight of the total amount of (A), (B), and (C) (G) Organic peroxide, (A), ( 0.2 to 5 parts by weight based on 100 parts by weight of the total amount of B) and (C) 3. The method for applying floor and wall coatings according to claim 1, wherein the base is a base having a porous surface.